Feeding device for centrifugal machines.



No. 685,320. Patehted Oct. 29,1901

, J. BERBIG'AN.

FEEDING DEVICE FOR CENTRIFDGAL MACHINES.

(Application filed Dec. 26, 1900.) (No Model.) 2 Sheets-Sheet I.

WITNESSES: INVENTOH r m 7 7 fi BY 9 W 5 I ATTORNEY No. 685,320. PtentedOct. 29,1901.

J. J. BERRIGAN. FEEDING DEVICE FOR CENTRIFUGAL MACHINES.

(Application filed Dec. 26, 1900.) (No Model.) 2 Shets-$heet 2.

III I I l I mill" INVENTOR 4 FTQRNEY UNITED STATES PATENT OFFIGE.

JOHN JOSEPH BERRIGAN, OF ORANGE, NEW JERSEY, ASSIGNOR TO FRANCIS J.AREND, OF NEW YORK, N. Y., AND JOHN BERNSTROM, OF STOCKHOLM, SWEDEN. I

FEEDING DEVICE FOR CEiNfTRIFUGAL MACHINES.

SPECIFICATION forming part of Letters Batent No. 685,320, dated October9, 1901- Application filed December 26, 1900, Serial No. 41,098. (Nomodel.) I

T at wlwm it may concern: V to'engage with a thread formed upon the Beitknown that I,J 0HN JOSEPH BERRIGAN, drum-periphery. A gasket 11 may beinterof Orange, Essex county,'New Jersey, have posed between cover anddrum to make a invented a new and useful Improvement in tight joint. Inthe cover 9 is acentral open- Feeding Devices for Centrifugal Machines,of ing to receive the flanged plug -12, which which the following is aspecification. supports the inlet-conduit 13. In the wall of Myinvention is a device for feeding the mareceptacle 8 is an opening 18,communicating terial to be treatedintoacentrifugalmachine. with thetapered conduit 19, formed in the My invention consists moreparticularly in plate 20, which extends between receptacle 8 to thecombination, with a rotary receptacle for and the smaller opening 21 inthe wall of the material to be treated having an inlet drum 5. Theopenings 18 and 21 and the for said material at or near its axis ofrotaconduct 19 together form an outlet for the tion, of a duct disposedwithin said vessel separated solid constituent in receptacle 8.transversely said axis and communicating .In Fig. l is shown a top viewof the de- 15 with said inlet and a device within said duct tachablehood 22 for receiving said'solid afconstructed to regulate the flow. ofmaterial; ter ejectment; but the presence of said hood also, in thecombination, with a rotary recepis not necessary. In the bottom ofreceptacle tacle forthe materialto be treated eccen- 8 is ashortpipe-section 26, through which trically placedwith reference toitsaxis of r0 the liquid constituent of the material under 20 tation andprovided with a feed-inlet, ofa treatment escapes into the pan 6, whichis transverse duct receiving the'material from within the'cup' 2. Saidpan has a horizontal said inlet, through whichduct said materialpartition 7 with a central opening 14, through is projected by theaction of centrifugal force which 'the short pipe'26 passes. against thewall of saidvessel; also, in the 31.is an escape tube for the liquidentering 25 combinations and mechanisms moreparticupan 6. In thewall ofreceptacle 8 are openlarly pointed out in the claims. v v ings" 48 and49 for allowing the liquid to In the accompanying drawings, Figure 1 isflow between receptacle 8 and drum 5. The a top view of a centrifugalmachine contain openings 50 in plate 20 serve to establish com- I ing myfeeding device. Fig. 2 is avertical munication for the liquid within thedrum 30 section on the line 2 2 of Fig. 1.; from one side of plate 20-to the other.

Similar characters of referenceindicatelike Secured in any suitable wayon the under parts. a side of the cover 9 is a plate 15, having a I Forthe purpose of illustrating my present flange or wall 51, which is cutaway at 52, device I have shown it embodied in the spe- Fig. 1.Journaled in the under side of this 35 cific form of centrifugalmachinewhich is displate is a rotary cylinder 32, which has arms 8;,closed in my application for Letters Patent, 33, which carry at theirends blades 31. When Serial No. 38,740, now pending. the cylinder 32 isrotated, these blades en- The object of said machine is to separate gagewith the solid material deposited on that solids from fluids and todeliver the solids in .portion of the inner periphery of receptacle 40 asubstantially dry state. 8 to which it is delivered by the plate 15 and0 1 is a standard. carry it to the outlet 18, "as hereinafter de- 2 is acup integrally cast therewith. scribed.

3 is a hollow shaft'passing through a gland On the lower portion of thecylinder 32 is a 4 in the bottom of said cup. Said shaft 3 is gear 35,which engages with a gear 36 on the 4 5 rotated byany convenient means,and it carupper end of a shaft 37, which shaft passes ries on its upperend the drum 5. Within through the hollow shaft 3 and is also to be saiddrum 5 is eccentrically fixed the cylin provided with any suitable meansfor effectdrical receptacle 8 for the materials to be ing its rotation.The pipe 38 serves to drain treated. The drum 5 is closed by a cover 9,off any leakage which may enter cup 2. 50 the flange 10 of which isinternally threaded I will now describe more particularly the feedingdevice. The upper pivot of shaft 53 extends up through the bottom ofplate 15 and carries the arms 54, 55, 56, and 57. The said arms inrotating sweep around in close proximity to the inner periphery of thecurved portion 58 of the wall 51 of plate 15. The inlet-pipe 13 is soplaced that it delivers all or the greater portion of the combinedconstituents to be separated into the space between the pivot 53 and thecurved portion 58 of wall 51. Assume for the moment that the arms 54 5556 57 are not present. The material from the inlet-pipe 13 would then bethrown by centrifugal force of rotation from the edge 52 of plate 15against the portion a b of the inner periphery of receptacle 8 which isdirectly opposite that edge; The liquid escaping through the openings 48and 49 into the drum 5 forms a ring, the inner limit of which isindicated by the dotted circle shown in Fig. 1, and as the material iscontinuously supplied there is a continuous outflow of liquid throughthe pipe 26 into the pan 6, and so to the outlet-pipe 31. The solidmaterial projected against the inner periphery of receptacle Sisconstantly removed by the blades 34, which carry it over thesubstantially dry surface within the receptacle 8 (represented by theare e or d, Fig. l) in accordance with the direction of movement of saidblades, and so to the opening 18, out of which it is ejected bycentrifugal force through the passage 19 and opening 21 in the wall ofdrum 5, whence it may immediately escape orpass into any suitablereceptacle, such as the hood 22. Special attention is called to the factthat the plate 15 is a device for directing the material to be treatedagainst a particular portion a b of the inner periphery of receptacle 8,this portion being in the apparatus here shown that most eccentric tothe axis of rotation of drum 5. This arrangement of the plate 15 fordirecting the incoming material against the most eccentric portion ofthe inner periphery of the eccentrically-placed receptacle is a newfeature in centrifugal machines. I have further found in practice thatwhen the material is a fluid mass of combined solid and liquid it isespecially advantageous to provide means for regulating the feed, andfor this purpose the rotating arms 54, 55, 56, and 57 are provided.These arms are driven at a speed less than that of the rotary drum.Assuming them to be at rest and in the position represented in Fig.1,they would then form a barrier to prevent the material lying in thequadrant e, between arms 54 and 55, and quadrantf, between arms 56 and57,from being thrown from the plate 15 by the centrifugal force. If,however, the arms 54 are carried around in the direction of the arrow,then so much of the material as lies in the quadrantf will be permittedto escape and will be thrown by centrifugal force ofi of plate 15 assaid quadrant assumes the position g, or, in other Words, eachquadrantal space included between adjacent arms becomes filled withmaterial, and

thus receives a definite quantity thereof, and these definite quantitiesare released and allowed successively to escape at the edge 52 of theplate 15 as each quad rant in turn assumes the position 9. The amount ofmaterial fed into the machine per given time will therefore depend uponthe capacity of the quadrantal spaces between the arms 55 56, &c., andthe speed of revolution of said arms. The amount of material fed intothe receptacle 8 may be proportioned to the capacity of the blades 34for removing it from the place of deposit to the outlet, or, in otherwords, the amount of feed to the machine may be adjusted to its capacityfor delivery either by suitably proportioning the feeding device withrespect to the blades or the blades with respect to the feeding deviceand by adjusting the speed of travel of feeding device to blades, orvice versa. Thus in the specific embodiment of my invention hereillustrated I show four arms with four quadrantal spaces between them.The delivery of this feeding device, therefore, for one revolution isequal to four times the amount of material which can be received in oneof said quadrantal spaces. This then is the quantity of material whichfor one revolution of the arms will be projected against the innerperiphery of receptacle 8. Now the arms 54, &c., are on the same shaftas the blades 34. Therefore one revolution of the arms 54 corresponds toone revolution of the blades 34. Therefore if the arms during onerevolution cause a deposit of material measured, as aforesaid, theblades 34 should be so proportioned that during one revolution theyshall be competent to collect and deliver that deposit to theescape-opening 18. Of course it is immaterial how many arms or bladesare provided,so long as the aforesaid result is achieved. In Fig. 1 Ishow four arms 54 55, &c., and five arms 33, carrying blades 34, andthis arrangement, other things being equal, gives blades 34 the capacityto remove more material than the feeding-arms can supply, which may bedesirable to avoid possibility of clogging; but of course I may have theblades 34 equal in number to the arms 54 55, so that each blade mayremove the amount ofmaterial deposited from one quadrantal space betweensaid arms.

I claim 1. In a centrifugal machine, a receptacle for the material to betreated eccentrically placed with reference to its axis of rotation andhaving an inlet for said material concen tric with said axis, a supportfor said receptacle rotary on said axis and a duct disposed within saidvessel and transversely said axis and communicating with said inlet;whereby the material entering said inlet and received in said transverseduct is projected from said duet against the inner peripherical wall ofsaid receptacle by the action of centrifugal force due to the rotationof said receptacle.

2. In a centrifugal machine, a receptacle for the material to be treatedeccentrically IIO - placed with reference to its axis of rotation andhaving aninlet for said material concentric with said axis, a supportfor said receptacle rotary on said axis and a duct closed at one end andopen at the other disposed within said receptacle and transversely saidaxis and communicating with said inlet; the open end of said duct beinglocated in proximity to the point of maximum eccentricity of the innerperipherical wall of said receptacle, whereby the material entering saidinlet and received in said duct is projected from said duct against saidwall by the action of centrifugal force due to the rotation of saidreceptacle.

3. In a centrifugal machine, a rotary receptacle for the'material to betreated having an inlet for said material concentric with its axis ofrotation, a duct disposed within said vessel transversely said axis andcommunicating with said inlet, and a device within said duct constructedto regulate the flow of the material passing through the same.

4. In a centrifugal machine, a rotary receptacle for the material to betreated having an inlet for said material concentric with its axis ofrotation, a duct disposed within said vessel transversely said axis andcommunicating with said inlet, a rotary shaft passing through saidreceptacle and entering said duct and a plurality of radial arms on saidshaft within said duct; the said shaft being located so that radial armson one side of the center thereof extend across the said inlet.

5. In a centrifugal machine, a rotary receptacle for the material to betreated, a duct therein constructed to receive theiucoming feed and todirect the same against the inner circumferential periphery of saidreceptacle, a rotary shaft passing through the said receptacle. and intosaid duct, radial arms on said shaft within said duct and radial armsonsaid shaft outside of said duct and scrapers on said last-named armsconstructed to remove the material deposited on said innercircumferential periphery.

6. In combination with the rotary receptacle 8 of a centrifugal machinehaving the axial inlet 13, the plate 15 having wall 51 and the cover 9constructed and arranged to form a radially-disposed duct within saidreceptacle, substantially as described.

7. In combination with the rotary vessel of a centrifugal machine havingan axial inlet, a duct extending radially from said inlet to the innerperiphery of said vessel, and rotary arms as 54, 55, disposed withinsaid duct, substantially as described.

S. In combination with the rotary receptacle 8 having an inlet, a ductextending radially from said inlet to the inner periphery of saidvessel, a rotary shaft in said vessel and extending into said duct, anarm 54 on said shaft within said duct, and an arm 33 carrying a blade34; on said shaft outside of said duct, substantially as described.

JOHN JOSEPH BERRIGAN. Witnesses:

JOHN S. PAUL, ROBERT H. HEEP.

